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Sage Weil16725b92009-10-06 11:31:07 -07001
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07002#include <linux/ceph/ceph_debug.h>
Sage Weil16725b92009-10-06 11:31:07 -07003
4#include <linux/backing-dev.h>
Sage Weilc309f0a2010-06-30 21:34:01 -07005#include <linux/ctype.h>
Sage Weil16725b92009-10-06 11:31:07 -07006#include <linux/fs.h>
7#include <linux/inet.h>
8#include <linux/in6.h>
9#include <linux/module.h>
10#include <linux/mount.h>
11#include <linux/parser.h>
Sage Weil16725b92009-10-06 11:31:07 -070012#include <linux/sched.h>
13#include <linux/seq_file.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Sage Weil16725b92009-10-06 11:31:07 -070015#include <linux/statfs.h>
16#include <linux/string.h>
Sage Weil16725b92009-10-06 11:31:07 -070017
Sage Weil16725b92009-10-06 11:31:07 -070018#include "super.h"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070019#include "mds_client.h"
Milosz Tanski99ccbd22013-08-21 17:29:54 -040020#include "cache.h"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070021
Sage Weil1fe60e52012-07-30 16:23:22 -070022#include <linux/ceph/ceph_features.h>
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070023#include <linux/ceph/decode.h>
24#include <linux/ceph/mon_client.h>
25#include <linux/ceph/auth.h>
26#include <linux/ceph/debugfs.h>
Sage Weil16725b92009-10-06 11:31:07 -070027
28/*
29 * Ceph superblock operations
30 *
31 * Handle the basics of mounting, unmounting.
32 */
33
Sage Weil16725b92009-10-06 11:31:07 -070034/*
35 * super ops
36 */
37static void ceph_put_super(struct super_block *s)
38{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070039 struct ceph_fs_client *fsc = ceph_sb_to_client(s);
Sage Weil16725b92009-10-06 11:31:07 -070040
41 dout("put_super\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070042 ceph_mdsc_close_sessions(fsc->mdsc);
Sage Weil16725b92009-10-06 11:31:07 -070043}
44
45static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
46{
David Howells2b0143b2015-03-17 22:25:59 +000047 struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry));
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070048 struct ceph_monmap *monmap = fsc->client->monc.monmap;
Sage Weil16725b92009-10-06 11:31:07 -070049 struct ceph_statfs st;
50 u64 fsid;
51 int err;
52
53 dout("statfs\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070054 err = ceph_monc_do_statfs(&fsc->client->monc, &st);
Sage Weil16725b92009-10-06 11:31:07 -070055 if (err < 0)
56 return err;
57
58 /* fill in kstatfs */
59 buf->f_type = CEPH_SUPER_MAGIC; /* ?? */
60
61 /*
62 * express utilization in terms of large blocks to avoid
63 * overflow on 32-bit machines.
Sage Weil92a49fb2013-02-22 15:31:00 -080064 *
65 * NOTE: for the time being, we make bsize == frsize to humor
66 * not-yet-ancient versions of glibc that are broken.
67 * Someday, we will probably want to report a real block
68 * size... whatever that may mean for a network file system!
Sage Weil16725b92009-10-06 11:31:07 -070069 */
70 buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
Sage Weil92a49fb2013-02-22 15:31:00 -080071 buf->f_frsize = 1 << CEPH_BLOCK_SHIFT;
Sage Weil16725b92009-10-06 11:31:07 -070072 buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
Greg Farnum8f04d422011-07-26 11:26:54 -070073 buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
Sage Weil16725b92009-10-06 11:31:07 -070074 buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
75
76 buf->f_files = le64_to_cpu(st.num_objects);
77 buf->f_ffree = -1;
Sage Weil558d3492010-06-01 12:51:12 -070078 buf->f_namelen = NAME_MAX;
Sage Weil16725b92009-10-06 11:31:07 -070079
80 /* leave fsid little-endian, regardless of host endianness */
81 fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1);
82 buf->f_fsid.val[0] = fsid & 0xffffffff;
83 buf->f_fsid.val[1] = fsid >> 32;
84
85 return 0;
86}
87
88
Sage Weil2d9c98a2010-07-30 09:38:13 -070089static int ceph_sync_fs(struct super_block *sb, int wait)
Sage Weil16725b92009-10-06 11:31:07 -070090{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070091 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
Sage Weil2d9c98a2010-07-30 09:38:13 -070092
93 if (!wait) {
94 dout("sync_fs (non-blocking)\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070095 ceph_flush_dirty_caps(fsc->mdsc);
Sage Weil2d9c98a2010-07-30 09:38:13 -070096 dout("sync_fs (non-blocking) done\n");
97 return 0;
98 }
99
100 dout("sync_fs (blocking)\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700101 ceph_osdc_sync(&fsc->client->osdc);
102 ceph_mdsc_sync(fsc->mdsc);
Sage Weil2d9c98a2010-07-30 09:38:13 -0700103 dout("sync_fs (blocking) done\n");
Sage Weil16725b92009-10-06 11:31:07 -0700104 return 0;
105}
106
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700107/*
108 * mount options
109 */
110enum {
111 Opt_wsize,
112 Opt_rsize,
Sage Weil83817e32011-08-04 08:03:44 -0700113 Opt_rasize,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700114 Opt_caps_wanted_delay_min,
115 Opt_caps_wanted_delay_max,
116 Opt_cap_release_safety,
117 Opt_readdir_max_entries,
118 Opt_readdir_max_bytes,
119 Opt_congestion_kb,
120 Opt_last_int,
121 /* int args above */
122 Opt_snapdirname,
123 Opt_last_string,
124 /* string args above */
125 Opt_dirstat,
126 Opt_nodirstat,
127 Opt_rbytes,
128 Opt_norbytes,
Alex Eldercffaba12012-02-15 07:43:54 -0600129 Opt_asyncreaddir,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700130 Opt_noasyncreaddir,
Sage Weila40dc6c2012-01-10 09:12:55 -0800131 Opt_dcache,
132 Opt_nodcache,
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800133 Opt_ino32,
Alex Eldercffaba12012-02-15 07:43:54 -0600134 Opt_noino32,
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400135 Opt_fscache,
Sage Weil45195e42014-02-16 10:05:29 -0800136 Opt_nofscache,
137#ifdef CONFIG_CEPH_FS_POSIX_ACL
138 Opt_acl,
139#endif
140 Opt_noacl
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700141};
142
143static match_table_t fsopt_tokens = {
144 {Opt_wsize, "wsize=%d"},
145 {Opt_rsize, "rsize=%d"},
Sage Weil83817e32011-08-04 08:03:44 -0700146 {Opt_rasize, "rasize=%d"},
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700147 {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
148 {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
149 {Opt_cap_release_safety, "cap_release_safety=%d"},
150 {Opt_readdir_max_entries, "readdir_max_entries=%d"},
151 {Opt_readdir_max_bytes, "readdir_max_bytes=%d"},
152 {Opt_congestion_kb, "write_congestion_kb=%d"},
153 /* int args above */
154 {Opt_snapdirname, "snapdirname=%s"},
155 /* string args above */
156 {Opt_dirstat, "dirstat"},
157 {Opt_nodirstat, "nodirstat"},
158 {Opt_rbytes, "rbytes"},
159 {Opt_norbytes, "norbytes"},
Alex Eldercffaba12012-02-15 07:43:54 -0600160 {Opt_asyncreaddir, "asyncreaddir"},
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700161 {Opt_noasyncreaddir, "noasyncreaddir"},
Sage Weila40dc6c2012-01-10 09:12:55 -0800162 {Opt_dcache, "dcache"},
163 {Opt_nodcache, "nodcache"},
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800164 {Opt_ino32, "ino32"},
Alex Eldercffaba12012-02-15 07:43:54 -0600165 {Opt_noino32, "noino32"},
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400166 {Opt_fscache, "fsc"},
167 {Opt_nofscache, "nofsc"},
Sage Weil45195e42014-02-16 10:05:29 -0800168#ifdef CONFIG_CEPH_FS_POSIX_ACL
169 {Opt_acl, "acl"},
170#endif
171 {Opt_noacl, "noacl"},
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700172 {-1, NULL}
173};
174
175static int parse_fsopt_token(char *c, void *private)
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800176{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700177 struct ceph_mount_options *fsopt = private;
178 substring_t argstr[MAX_OPT_ARGS];
179 int token, intval, ret;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800180
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700181 token = match_token((char *)c, fsopt_tokens, argstr);
182 if (token < 0)
183 return -EINVAL;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800184
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700185 if (token < Opt_last_int) {
186 ret = match_int(&argstr[0], &intval);
187 if (ret < 0) {
188 pr_err("bad mount option arg (not int) "
189 "at '%s'\n", c);
190 return ret;
191 }
192 dout("got int token %d val %d\n", token, intval);
193 } else if (token > Opt_last_int && token < Opt_last_string) {
194 dout("got string token %d val %s\n", token,
195 argstr[0].from);
196 } else {
197 dout("got token %d\n", token);
198 }
199
200 switch (token) {
201 case Opt_snapdirname:
202 kfree(fsopt->snapdir_name);
203 fsopt->snapdir_name = kstrndup(argstr[0].from,
204 argstr[0].to-argstr[0].from,
205 GFP_KERNEL);
206 if (!fsopt->snapdir_name)
207 return -ENOMEM;
208 break;
209
210 /* misc */
211 case Opt_wsize:
212 fsopt->wsize = intval;
213 break;
214 case Opt_rsize:
215 fsopt->rsize = intval;
216 break;
Sage Weil83817e32011-08-04 08:03:44 -0700217 case Opt_rasize:
218 fsopt->rasize = intval;
219 break;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700220 case Opt_caps_wanted_delay_min:
221 fsopt->caps_wanted_delay_min = intval;
222 break;
223 case Opt_caps_wanted_delay_max:
224 fsopt->caps_wanted_delay_max = intval;
225 break;
226 case Opt_readdir_max_entries:
227 fsopt->max_readdir = intval;
228 break;
229 case Opt_readdir_max_bytes:
230 fsopt->max_readdir_bytes = intval;
231 break;
232 case Opt_congestion_kb:
233 fsopt->congestion_kb = intval;
234 break;
235 case Opt_dirstat:
236 fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT;
237 break;
238 case Opt_nodirstat:
239 fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT;
240 break;
241 case Opt_rbytes:
242 fsopt->flags |= CEPH_MOUNT_OPT_RBYTES;
243 break;
244 case Opt_norbytes:
245 fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES;
246 break;
Alex Eldercffaba12012-02-15 07:43:54 -0600247 case Opt_asyncreaddir:
248 fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR;
249 break;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700250 case Opt_noasyncreaddir:
251 fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
252 break;
Sage Weila40dc6c2012-01-10 09:12:55 -0800253 case Opt_dcache:
254 fsopt->flags |= CEPH_MOUNT_OPT_DCACHE;
255 break;
256 case Opt_nodcache:
257 fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE;
258 break;
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800259 case Opt_ino32:
260 fsopt->flags |= CEPH_MOUNT_OPT_INO32;
261 break;
Alex Eldercffaba12012-02-15 07:43:54 -0600262 case Opt_noino32:
263 fsopt->flags &= ~CEPH_MOUNT_OPT_INO32;
264 break;
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400265 case Opt_fscache:
266 fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE;
267 break;
268 case Opt_nofscache:
269 fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE;
270 break;
Sage Weil45195e42014-02-16 10:05:29 -0800271#ifdef CONFIG_CEPH_FS_POSIX_ACL
272 case Opt_acl:
273 fsopt->sb_flags |= MS_POSIXACL;
274 break;
275#endif
276 case Opt_noacl:
277 fsopt->sb_flags &= ~MS_POSIXACL;
278 break;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700279 default:
280 BUG_ON(token);
281 }
282 return 0;
283}
284
285static void destroy_mount_options(struct ceph_mount_options *args)
286{
287 dout("destroy_mount_options %p\n", args);
288 kfree(args->snapdir_name);
289 kfree(args);
290}
291
292static int strcmp_null(const char *s1, const char *s2)
293{
294 if (!s1 && !s2)
295 return 0;
296 if (s1 && !s2)
297 return -1;
298 if (!s1 && s2)
299 return 1;
300 return strcmp(s1, s2);
301}
302
303static int compare_mount_options(struct ceph_mount_options *new_fsopt,
304 struct ceph_options *new_opt,
305 struct ceph_fs_client *fsc)
306{
307 struct ceph_mount_options *fsopt1 = new_fsopt;
308 struct ceph_mount_options *fsopt2 = fsc->mount_options;
309 int ofs = offsetof(struct ceph_mount_options, snapdir_name);
310 int ret;
311
312 ret = memcmp(fsopt1, fsopt2, ofs);
313 if (ret)
314 return ret;
315
316 ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name);
317 if (ret)
318 return ret;
319
320 return ceph_compare_options(new_opt, fsc->client);
321}
322
323static int parse_mount_options(struct ceph_mount_options **pfsopt,
324 struct ceph_options **popt,
325 int flags, char *options,
326 const char *dev_name,
327 const char **path)
328{
329 struct ceph_mount_options *fsopt;
330 const char *dev_name_end;
Alex Elderc98f5332012-08-09 10:33:26 -0700331 int err;
332
333 if (!dev_name || !*dev_name)
334 return -EINVAL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700335
336 fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL);
337 if (!fsopt)
338 return -ENOMEM;
339
340 dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name);
341
Noah Watkins80db8be2011-08-22 13:49:23 -0600342 fsopt->sb_flags = flags;
343 fsopt->flags = CEPH_MOUNT_OPT_DEFAULT;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700344
Noah Watkins80db8be2011-08-22 13:49:23 -0600345 fsopt->rsize = CEPH_RSIZE_DEFAULT;
346 fsopt->rasize = CEPH_RASIZE_DEFAULT;
347 fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL);
Sanidhya Kashyapa149bb92015-03-21 12:54:58 -0400348 if (!fsopt->snapdir_name) {
349 err = -ENOMEM;
350 goto out;
351 }
352
Sage Weil50aac4f2011-01-18 07:59:40 -0800353 fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
354 fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
Noah Watkins80db8be2011-08-22 13:49:23 -0600355 fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT;
356 fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT;
357 fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT;
358 fsopt->congestion_kb = default_congestion_kb();
359
Alex Elderc98f5332012-08-09 10:33:26 -0700360 /*
361 * Distinguish the server list from the path in "dev_name".
362 * Internally we do not include the leading '/' in the path.
363 *
364 * "dev_name" will look like:
365 * <server_spec>[,<server_spec>...]:[<path>]
366 * where
367 * <server_spec> is <ip>[:<port>]
368 * <path> is optional, but if present must begin with '/'
369 */
370 dev_name_end = strchr(dev_name, '/');
371 if (dev_name_end) {
372 /* skip over leading '/' for path */
373 *path = dev_name_end + 1;
374 } else {
375 /* path is empty */
376 dev_name_end = dev_name + strlen(dev_name);
377 *path = dev_name_end;
378 }
Noah Watkins80db8be2011-08-22 13:49:23 -0600379 err = -EINVAL;
Alex Elderc98f5332012-08-09 10:33:26 -0700380 dev_name_end--; /* back up to ':' separator */
Sasha Levin54464292013-07-01 18:33:39 -0400381 if (dev_name_end < dev_name || *dev_name_end != ':') {
Alex Elderc98f5332012-08-09 10:33:26 -0700382 pr_err("device name is missing path (no : separator in %s)\n",
Noah Watkins80db8be2011-08-22 13:49:23 -0600383 dev_name);
384 goto out;
385 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700386 dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700387 dout("server path '%s'\n", *path);
388
Alex Elderee577412012-01-24 10:08:36 -0600389 *popt = ceph_parse_options(options, dev_name, dev_name_end,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700390 parse_fsopt_token, (void *)fsopt);
Alex Elderee577412012-01-24 10:08:36 -0600391 if (IS_ERR(*popt)) {
392 err = PTR_ERR(*popt);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700393 goto out;
Alex Elderee577412012-01-24 10:08:36 -0600394 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700395
396 /* success */
397 *pfsopt = fsopt;
398 return 0;
399
400out:
401 destroy_mount_options(fsopt);
402 return err;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800403}
404
Sage Weil6e19a162010-04-29 16:38:32 -0700405/**
406 * ceph_show_options - Show mount options in /proc/mounts
407 * @m: seq_file to write to
Al Viro34c80b12011-12-08 21:32:45 -0500408 * @root: root of that (sub)tree
Sage Weil6e19a162010-04-29 16:38:32 -0700409 */
Al Viro34c80b12011-12-08 21:32:45 -0500410static int ceph_show_options(struct seq_file *m, struct dentry *root)
Sage Weil6e19a162010-04-29 16:38:32 -0700411{
Al Viro34c80b12011-12-08 21:32:45 -0500412 struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700413 struct ceph_mount_options *fsopt = fsc->mount_options;
Ilya Dryomovff40f9a2015-03-25 21:02:16 +0300414 size_t pos;
415 int ret;
Sage Weil6e19a162010-04-29 16:38:32 -0700416
Ilya Dryomovff40f9a2015-03-25 21:02:16 +0300417 /* a comma between MNT/MS and client options */
418 seq_putc(m, ',');
419 pos = m->count;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700420
Ilya Dryomovff40f9a2015-03-25 21:02:16 +0300421 ret = ceph_print_client_options(m, fsc->client);
422 if (ret)
423 return ret;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700424
Ilya Dryomovff40f9a2015-03-25 21:02:16 +0300425 /* retract our comma if no client options */
426 if (m->count == pos)
427 m->count--;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700428
429 if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT)
430 seq_puts(m, ",dirstat");
431 if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0)
432 seq_puts(m, ",norbytes");
433 if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR)
Sage Weil6e19a162010-04-29 16:38:32 -0700434 seq_puts(m, ",noasyncreaddir");
Ilya Dryomovff7eeb82015-03-25 21:10:09 +0300435 if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0)
Sage Weila40dc6c2012-01-10 09:12:55 -0800436 seq_puts(m, ",nodcache");
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400437 if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE)
438 seq_puts(m, ",fsc");
Sage Weil6e19a162010-04-29 16:38:32 -0700439
Sage Weil45195e42014-02-16 10:05:29 -0800440#ifdef CONFIG_CEPH_FS_POSIX_ACL
441 if (fsopt->sb_flags & MS_POSIXACL)
442 seq_puts(m, ",acl");
443 else
444 seq_puts(m, ",noacl");
445#endif
446
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700447 if (fsopt->wsize)
448 seq_printf(m, ",wsize=%d", fsopt->wsize);
Sage Weil80456f82011-03-10 13:33:26 -0800449 if (fsopt->rsize != CEPH_RSIZE_DEFAULT)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700450 seq_printf(m, ",rsize=%d", fsopt->rsize);
Sage Weil83817e32011-08-04 08:03:44 -0700451 if (fsopt->rasize != CEPH_RASIZE_DEFAULT)
Sage Weil21519372011-12-01 08:06:52 -0800452 seq_printf(m, ",rasize=%d", fsopt->rasize);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700453 if (fsopt->congestion_kb != default_congestion_kb())
454 seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb);
455 if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700456 seq_printf(m, ",caps_wanted_delay_min=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700457 fsopt->caps_wanted_delay_min);
458 if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700459 seq_printf(m, ",caps_wanted_delay_max=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700460 fsopt->caps_wanted_delay_max);
461 if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700462 seq_printf(m, ",cap_release_safety=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700463 fsopt->cap_release_safety);
464 if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT)
465 seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir);
466 if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT)
467 seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes);
468 if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
469 seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name);
Ilya Dryomovff40f9a2015-03-25 21:02:16 +0300470
Sage Weil6e19a162010-04-29 16:38:32 -0700471 return 0;
472}
473
474/*
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700475 * handle any mon messages the standard library doesn't understand.
476 * return error if we don't either.
477 */
478static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg)
479{
480 struct ceph_fs_client *fsc = client->private;
481 int type = le16_to_cpu(msg->hdr.type);
482
483 switch (type) {
484 case CEPH_MSG_MDS_MAP:
485 ceph_mdsc_handle_map(fsc->mdsc, msg);
486 return 0;
487
488 default:
489 return -1;
490 }
491}
492
493/*
494 * create a new fs client
495 */
H Hartley Sweeten0c6d4b4e22011-09-23 11:53:30 -0700496static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700497 struct ceph_options *opt)
498{
499 struct ceph_fs_client *fsc;
Ilya Dryomov12b46292013-12-24 21:19:23 +0200500 const u64 supported_features =
Sage Weil6ab00d42011-08-09 09:41:59 -0700501 CEPH_FEATURE_FLOCK |
Yan, Zheng65a22662014-11-17 10:01:03 +0800502 CEPH_FEATURE_DIRLAYOUTHASH |
503 CEPH_FEATURE_MDS_INLINE_DATA;
Ilya Dryomov12b46292013-12-24 21:19:23 +0200504 const u64 required_features = 0;
Alex Elder3bf53332013-04-01 10:48:40 -0500505 int page_count;
506 size_t size;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700507 int err = -ENOMEM;
508
509 fsc = kzalloc(sizeof(*fsc), GFP_KERNEL);
510 if (!fsc)
511 return ERR_PTR(-ENOMEM);
512
Sage Weil6ab00d42011-08-09 09:41:59 -0700513 fsc->client = ceph_create_client(opt, fsc, supported_features,
514 required_features);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700515 if (IS_ERR(fsc->client)) {
516 err = PTR_ERR(fsc->client);
517 goto fail;
518 }
519 fsc->client->extra_mon_dispatch = extra_mon_dispatch;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700520 fsc->client->monc.want_mdsmap = 1;
521
522 fsc->mount_options = fsopt;
523
524 fsc->sb = NULL;
525 fsc->mount_state = CEPH_MOUNT_MOUNTING;
526
527 atomic_long_set(&fsc->writeback_count, 0);
528
529 err = bdi_init(&fsc->backing_dev_info);
530 if (err < 0)
531 goto fail_client;
532
533 err = -ENOMEM;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100534 /*
535 * The number of concurrent works can be high but they don't need
536 * to be processed in parallel, limit concurrency.
537 */
538 fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700539 if (fsc->wb_wq == NULL)
540 goto fail_bdi;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100541 fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700542 if (fsc->pg_inv_wq == NULL)
543 goto fail_wb_wq;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100544 fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700545 if (fsc->trunc_wq == NULL)
546 goto fail_pg_inv_wq;
547
548 /* set up mempools */
549 err = -ENOMEM;
Alex Elder3bf53332013-04-01 10:48:40 -0500550 page_count = fsc->mount_options->wsize >> PAGE_CACHE_SHIFT;
551 size = sizeof (struct page *) * (page_count ? page_count : 1);
552 fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700553 if (!fsc->wb_pagevec_pool)
554 goto fail_trunc_wq;
555
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400556 /* setup fscache */
557 if ((fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) &&
558 (ceph_fscache_register_fs(fsc) != 0))
559 goto fail_fscache;
560
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700561 /* caps */
562 fsc->min_caps = fsopt->max_readdir;
563
564 return fsc;
565
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400566fail_fscache:
567 ceph_fscache_unregister_fs(fsc);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700568fail_trunc_wq:
569 destroy_workqueue(fsc->trunc_wq);
570fail_pg_inv_wq:
571 destroy_workqueue(fsc->pg_inv_wq);
572fail_wb_wq:
573 destroy_workqueue(fsc->wb_wq);
574fail_bdi:
575 bdi_destroy(&fsc->backing_dev_info);
576fail_client:
577 ceph_destroy_client(fsc->client);
578fail:
579 kfree(fsc);
580 return ERR_PTR(err);
581}
582
H Hartley Sweeten0c6d4b4e22011-09-23 11:53:30 -0700583static void destroy_fs_client(struct ceph_fs_client *fsc)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700584{
585 dout("destroy_fs_client %p\n", fsc);
586
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400587 ceph_fscache_unregister_fs(fsc);
588
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700589 destroy_workqueue(fsc->wb_wq);
590 destroy_workqueue(fsc->pg_inv_wq);
591 destroy_workqueue(fsc->trunc_wq);
592
593 bdi_destroy(&fsc->backing_dev_info);
594
595 mempool_destroy(fsc->wb_pagevec_pool);
596
597 destroy_mount_options(fsc->mount_options);
598
599 ceph_fs_debugfs_cleanup(fsc);
600
601 ceph_destroy_client(fsc->client);
602
603 kfree(fsc);
604 dout("destroy_fs_client %p done\n", fsc);
605}
606
607/*
Sage Weil6e19a162010-04-29 16:38:32 -0700608 * caches
609 */
610struct kmem_cache *ceph_inode_cachep;
611struct kmem_cache *ceph_cap_cachep;
612struct kmem_cache *ceph_dentry_cachep;
613struct kmem_cache *ceph_file_cachep;
614
615static void ceph_inode_init_once(void *foo)
616{
617 struct ceph_inode_info *ci = foo;
618 inode_init_once(&ci->vfs_inode);
619}
620
Sage Weil16725b92009-10-06 11:31:07 -0700621static int __init init_caches(void)
622{
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400623 int error = -ENOMEM;
624
Sage Weil16725b92009-10-06 11:31:07 -0700625 ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
626 sizeof(struct ceph_inode_info),
627 __alignof__(struct ceph_inode_info),
628 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
629 ceph_inode_init_once);
630 if (ceph_inode_cachep == NULL)
631 return -ENOMEM;
632
633 ceph_cap_cachep = KMEM_CACHE(ceph_cap,
634 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
635 if (ceph_cap_cachep == NULL)
636 goto bad_cap;
637
638 ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
639 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
640 if (ceph_dentry_cachep == NULL)
641 goto bad_dentry;
642
643 ceph_file_cachep = KMEM_CACHE(ceph_file_info,
644 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
645 if (ceph_file_cachep == NULL)
646 goto bad_file;
647
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400648 if ((error = ceph_fscache_register()))
649 goto bad_file;
Sage Weil16725b92009-10-06 11:31:07 -0700650
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400651 return 0;
Sage Weil16725b92009-10-06 11:31:07 -0700652bad_file:
653 kmem_cache_destroy(ceph_dentry_cachep);
654bad_dentry:
655 kmem_cache_destroy(ceph_cap_cachep);
656bad_cap:
657 kmem_cache_destroy(ceph_inode_cachep);
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400658 return error;
Sage Weil16725b92009-10-06 11:31:07 -0700659}
660
661static void destroy_caches(void)
662{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000663 /*
664 * Make sure all delayed rcu free inodes are flushed before we
665 * destroy cache.
666 */
667 rcu_barrier();
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400668
Sage Weil16725b92009-10-06 11:31:07 -0700669 kmem_cache_destroy(ceph_inode_cachep);
670 kmem_cache_destroy(ceph_cap_cachep);
671 kmem_cache_destroy(ceph_dentry_cachep);
672 kmem_cache_destroy(ceph_file_cachep);
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400673
674 ceph_fscache_unregister();
Sage Weil16725b92009-10-06 11:31:07 -0700675}
676
677
678/*
679 * ceph_umount_begin - initiate forced umount. Tear down down the
680 * mount, skipping steps that may hang while waiting for server(s).
681 */
682static void ceph_umount_begin(struct super_block *sb)
683{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700684 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700685
686 dout("ceph_umount_begin - starting forced umount\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700687 if (!fsc)
Sage Weil16725b92009-10-06 11:31:07 -0700688 return;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700689 fsc->mount_state = CEPH_MOUNT_SHUTDOWN;
Sage Weil16725b92009-10-06 11:31:07 -0700690 return;
691}
692
693static const struct super_operations ceph_super_ops = {
694 .alloc_inode = ceph_alloc_inode,
695 .destroy_inode = ceph_destroy_inode,
696 .write_inode = ceph_write_inode,
Yan, Zheng9f12bd12013-09-20 19:55:31 +0800697 .drop_inode = ceph_drop_inode,
Sage Weil2d9c98a2010-07-30 09:38:13 -0700698 .sync_fs = ceph_sync_fs,
Sage Weil16725b92009-10-06 11:31:07 -0700699 .put_super = ceph_put_super,
700 .show_options = ceph_show_options,
701 .statfs = ceph_statfs,
702 .umount_begin = ceph_umount_begin,
703};
704
Sage Weil16725b92009-10-06 11:31:07 -0700705/*
706 * Bootstrap mount by opening the root directory. Note the mount
707 * @started time from caller, and time out if this takes too long.
708 */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700709static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
Sage Weil16725b92009-10-06 11:31:07 -0700710 const char *path,
711 unsigned long started)
712{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700713 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil16725b92009-10-06 11:31:07 -0700714 struct ceph_mds_request *req = NULL;
715 int err;
716 struct dentry *root;
717
718 /* open dir */
719 dout("open_root_inode opening '%s'\n", path);
720 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
721 if (IS_ERR(req))
Julia Lawall7e34bc52010-05-22 12:01:14 +0200722 return ERR_CAST(req);
Sage Weil16725b92009-10-06 11:31:07 -0700723 req->r_path1 = kstrdup(path, GFP_NOFS);
Sanidhya Kashyapa149bb92015-03-21 12:54:58 -0400724 if (!req->r_path1) {
725 root = ERR_PTR(-ENOMEM);
726 goto out;
727 }
728
Sage Weil16725b92009-10-06 11:31:07 -0700729 req->r_ino1.ino = CEPH_INO_ROOT;
730 req->r_ino1.snap = CEPH_NOSNAP;
731 req->r_started = started;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700732 req->r_timeout = fsc->client->options->mount_timeout * HZ;
Sage Weil16725b92009-10-06 11:31:07 -0700733 req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
734 req->r_num_caps = 2;
735 err = ceph_mdsc_do_request(mdsc, NULL, req);
736 if (err == 0) {
Al Viro3c5184e2012-01-09 16:34:32 -0500737 struct inode *inode = req->r_target_inode;
738 req->r_target_inode = NULL;
Sage Weil16725b92009-10-06 11:31:07 -0700739 dout("open_root_inode success\n");
Al Viro3c5184e2012-01-09 16:34:32 -0500740 if (ceph_ino(inode) == CEPH_INO_ROOT &&
Sage Weil774ac212011-11-11 09:48:08 -0800741 fsc->sb->s_root == NULL) {
Al Viro48fde702012-01-08 22:15:13 -0500742 root = d_make_root(inode);
Al Viro3c5184e2012-01-09 16:34:32 -0500743 if (!root) {
Al Viro3c5184e2012-01-09 16:34:32 -0500744 root = ERR_PTR(-ENOMEM);
745 goto out;
746 }
Sage Weil774ac212011-11-11 09:48:08 -0800747 } else {
J. Bruce Fields1a0a3972014-02-14 17:35:37 -0500748 root = d_obtain_root(inode);
Sage Weil774ac212011-11-11 09:48:08 -0800749 }
Linus Torvalds1a52bb02012-01-13 10:29:21 -0800750 ceph_init_dentry(root);
Sage Weil16725b92009-10-06 11:31:07 -0700751 dout("open_root_inode success, root dentry is %p\n", root);
752 } else {
753 root = ERR_PTR(err);
754 }
Al Viro3c5184e2012-01-09 16:34:32 -0500755out:
Sage Weil16725b92009-10-06 11:31:07 -0700756 ceph_mdsc_put_request(req);
757 return root;
758}
759
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700760
761
762
Sage Weil16725b92009-10-06 11:31:07 -0700763/*
764 * mount: join the ceph cluster, and open root directory.
765 */
Al Viroa7f9fb22010-07-26 16:17:55 +0400766static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc,
Sage Weil16725b92009-10-06 11:31:07 -0700767 const char *path)
768{
Sage Weil16725b92009-10-06 11:31:07 -0700769 int err;
Sage Weil16725b92009-10-06 11:31:07 -0700770 unsigned long started = jiffies; /* note the start time */
771 struct dentry *root;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700772 int first = 0; /* first vfsmount for this super_block */
Sage Weil16725b92009-10-06 11:31:07 -0700773
774 dout("mount start\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700775 mutex_lock(&fsc->client->mount_mutex);
Sage Weil16725b92009-10-06 11:31:07 -0700776
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700777 err = __ceph_open_session(fsc->client, started);
Sage Weil16725b92009-10-06 11:31:07 -0700778 if (err < 0)
779 goto out;
780
Sage Weil16725b92009-10-06 11:31:07 -0700781 dout("mount opening root\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700782 root = open_root_dentry(fsc, "", started);
Sage Weil16725b92009-10-06 11:31:07 -0700783 if (IS_ERR(root)) {
784 err = PTR_ERR(root);
785 goto out;
786 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700787 if (fsc->sb->s_root) {
Sage Weil16725b92009-10-06 11:31:07 -0700788 dput(root);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700789 } else {
790 fsc->sb->s_root = root;
791 first = 1;
792
793 err = ceph_fs_debugfs_init(fsc);
794 if (err < 0)
795 goto fail;
796 }
Sage Weil16725b92009-10-06 11:31:07 -0700797
798 if (path[0] == 0) {
799 dget(root);
800 } else {
801 dout("mount opening base mountpoint\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700802 root = open_root_dentry(fsc, path, started);
Sage Weil16725b92009-10-06 11:31:07 -0700803 if (IS_ERR(root)) {
804 err = PTR_ERR(root);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700805 goto fail;
Sage Weil16725b92009-10-06 11:31:07 -0700806 }
807 }
808
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700809 fsc->mount_state = CEPH_MOUNT_MOUNTED;
Sage Weil16725b92009-10-06 11:31:07 -0700810 dout("mount success\n");
Al Viroa7f9fb22010-07-26 16:17:55 +0400811 mutex_unlock(&fsc->client->mount_mutex);
812 return root;
Sage Weil16725b92009-10-06 11:31:07 -0700813
814out:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700815 mutex_unlock(&fsc->client->mount_mutex);
Al Viroa7f9fb22010-07-26 16:17:55 +0400816 return ERR_PTR(err);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700817
818fail:
819 if (first) {
820 dput(fsc->sb->s_root);
821 fsc->sb->s_root = NULL;
822 }
823 goto out;
Sage Weil16725b92009-10-06 11:31:07 -0700824}
825
826static int ceph_set_super(struct super_block *s, void *data)
827{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700828 struct ceph_fs_client *fsc = data;
Sage Weil16725b92009-10-06 11:31:07 -0700829 int ret;
830
831 dout("set_super %p data %p\n", s, data);
832
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700833 s->s_flags = fsc->mount_options->sb_flags;
Sage Weil16725b92009-10-06 11:31:07 -0700834 s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */
835
Guangliang Zhao7221fe42013-11-11 15:18:03 +0800836 s->s_xattr = ceph_xattr_handlers;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700837 s->s_fs_info = fsc;
838 fsc->sb = s;
Sage Weil16725b92009-10-06 11:31:07 -0700839
840 s->s_op = &ceph_super_ops;
841 s->s_export_op = &ceph_export_ops;
842
843 s->s_time_gran = 1000; /* 1000 ns == 1 us */
844
845 ret = set_anon_super(s, NULL); /* what is that second arg for? */
846 if (ret != 0)
847 goto fail;
848
849 return ret;
850
851fail:
852 s->s_fs_info = NULL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700853 fsc->sb = NULL;
Sage Weil16725b92009-10-06 11:31:07 -0700854 return ret;
855}
856
857/*
858 * share superblock if same fs AND options
859 */
860static int ceph_compare_super(struct super_block *sb, void *data)
861{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700862 struct ceph_fs_client *new = data;
863 struct ceph_mount_options *fsopt = new->mount_options;
864 struct ceph_options *opt = new->client->options;
865 struct ceph_fs_client *other = ceph_sb_to_client(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700866
867 dout("ceph_compare_super %p\n", sb);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700868
869 if (compare_mount_options(fsopt, opt, other)) {
870 dout("monitor(s)/mount options don't match\n");
871 return 0;
Sage Weil16725b92009-10-06 11:31:07 -0700872 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700873 if ((opt->flags & CEPH_OPT_FSID) &&
874 ceph_fsid_compare(&opt->fsid, &other->client->fsid)) {
875 dout("fsid doesn't match\n");
876 return 0;
877 }
878 if (fsopt->sb_flags != other->mount_options->sb_flags) {
Sage Weil16725b92009-10-06 11:31:07 -0700879 dout("flags differ\n");
880 return 0;
881 }
882 return 1;
883}
884
885/*
886 * construct our own bdi so we can control readahead, etc.
887 */
Jeff Mahoney00d56432010-06-10 11:13:58 -0400888static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
Sage Weil31e0cf82010-05-04 16:39:35 -0700889
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700890static int ceph_register_bdi(struct super_block *sb,
891 struct ceph_fs_client *fsc)
Sage Weil16725b92009-10-06 11:31:07 -0700892{
893 int err;
894
Sage Weil83817e32011-08-04 08:03:44 -0700895 /* set ra_pages based on rasize mount option? */
896 if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700897 fsc->backing_dev_info.ra_pages =
Sage Weil83817e32011-08-04 08:03:44 -0700898 (fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1)
Sage Weil16725b92009-10-06 11:31:07 -0700899 >> PAGE_SHIFT;
Yehuda Sadehe9852222011-07-22 11:12:28 -0700900 else
901 fsc->backing_dev_info.ra_pages =
Christoph Hellwigdf0ce262015-01-14 10:42:41 +0100902 VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE;
Yehuda Sadehe9852222011-07-22 11:12:28 -0700903
Joe Perchesd2cc4dd2012-11-29 08:37:03 -0600904 err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld",
Sage Weil31e0cf82010-05-04 16:39:35 -0700905 atomic_long_inc_return(&bdi_seq));
Sage Weil5dfc5892010-05-04 16:14:46 -0700906 if (!err)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700907 sb->s_bdi = &fsc->backing_dev_info;
Sage Weil16725b92009-10-06 11:31:07 -0700908 return err;
909}
910
Al Viroa7f9fb22010-07-26 16:17:55 +0400911static struct dentry *ceph_mount(struct file_system_type *fs_type,
912 int flags, const char *dev_name, void *data)
Sage Weil16725b92009-10-06 11:31:07 -0700913{
914 struct super_block *sb;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700915 struct ceph_fs_client *fsc;
Al Viroa7f9fb22010-07-26 16:17:55 +0400916 struct dentry *res;
Sage Weil16725b92009-10-06 11:31:07 -0700917 int err;
918 int (*compare_super)(struct super_block *, void *) = ceph_compare_super;
Sage Weil6a18be12009-11-04 11:40:05 -0800919 const char *path = NULL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700920 struct ceph_mount_options *fsopt = NULL;
921 struct ceph_options *opt = NULL;
Sage Weil16725b92009-10-06 11:31:07 -0700922
Al Viroa7f9fb22010-07-26 16:17:55 +0400923 dout("ceph_mount\n");
Sage Weil45195e42014-02-16 10:05:29 -0800924
925#ifdef CONFIG_CEPH_FS_POSIX_ACL
926 flags |= MS_POSIXACL;
927#endif
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700928 err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path);
Al Viroa7f9fb22010-07-26 16:17:55 +0400929 if (err < 0) {
930 res = ERR_PTR(err);
Sage Weil6b805182009-10-27 11:50:50 -0700931 goto out_final;
Al Viroa7f9fb22010-07-26 16:17:55 +0400932 }
Sage Weil16725b92009-10-06 11:31:07 -0700933
934 /* create client (which we may/may not use) */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700935 fsc = create_fs_client(fsopt, opt);
936 if (IS_ERR(fsc)) {
Al Viroa7f9fb22010-07-26 16:17:55 +0400937 res = ERR_CAST(fsc);
Noah Watkins259a1872011-08-22 13:49:41 -0600938 destroy_mount_options(fsopt);
939 ceph_destroy_options(opt);
Sage Weil6b805182009-10-27 11:50:50 -0700940 goto out_final;
941 }
Sage Weil16725b92009-10-06 11:31:07 -0700942
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700943 err = ceph_mdsc_init(fsc);
Al Viroa7f9fb22010-07-26 16:17:55 +0400944 if (err < 0) {
945 res = ERR_PTR(err);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700946 goto out;
Al Viroa7f9fb22010-07-26 16:17:55 +0400947 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700948
949 if (ceph_test_opt(fsc->client, NOSHARE))
Sage Weil16725b92009-10-06 11:31:07 -0700950 compare_super = NULL;
David Howells9249e172012-06-25 12:55:37 +0100951 sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700952 if (IS_ERR(sb)) {
Al Viroa7f9fb22010-07-26 16:17:55 +0400953 res = ERR_CAST(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700954 goto out;
955 }
956
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700957 if (ceph_sb_to_client(sb) != fsc) {
958 ceph_mdsc_destroy(fsc);
959 destroy_fs_client(fsc);
960 fsc = ceph_sb_to_client(sb);
961 dout("get_sb got existing client %p\n", fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700962 } else {
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700963 dout("get_sb using new client %p\n", fsc);
964 err = ceph_register_bdi(sb, fsc);
Al Viroa7f9fb22010-07-26 16:17:55 +0400965 if (err < 0) {
966 res = ERR_PTR(err);
Sage Weil16725b92009-10-06 11:31:07 -0700967 goto out_splat;
Al Viroa7f9fb22010-07-26 16:17:55 +0400968 }
Sage Weil16725b92009-10-06 11:31:07 -0700969 }
970
Al Viroa7f9fb22010-07-26 16:17:55 +0400971 res = ceph_real_mount(fsc, path);
972 if (IS_ERR(res))
Sage Weil16725b92009-10-06 11:31:07 -0700973 goto out_splat;
Al Viroa7f9fb22010-07-26 16:17:55 +0400974 dout("root %p inode %p ino %llx.%llx\n", res,
David Howells2b0143b2015-03-17 22:25:59 +0000975 d_inode(res), ceph_vinop(d_inode(res)));
Al Viroa7f9fb22010-07-26 16:17:55 +0400976 return res;
Sage Weil16725b92009-10-06 11:31:07 -0700977
978out_splat:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700979 ceph_mdsc_close_sessions(fsc->mdsc);
Al Viro3981f2e2010-03-21 19:22:29 -0400980 deactivate_locked_super(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700981 goto out_final;
982
983out:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700984 ceph_mdsc_destroy(fsc);
985 destroy_fs_client(fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700986out_final:
Al Viroa7f9fb22010-07-26 16:17:55 +0400987 dout("ceph_mount fail %ld\n", PTR_ERR(res));
988 return res;
Sage Weil16725b92009-10-06 11:31:07 -0700989}
990
991static void ceph_kill_sb(struct super_block *s)
992{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700993 struct ceph_fs_client *fsc = ceph_sb_to_client(s);
Christoph Hellwige4d27502015-01-14 10:42:38 +0100994 dev_t dev = s->s_dev;
995
Sage Weil16725b92009-10-06 11:31:07 -0700996 dout("kill_sb %p\n", s);
Christoph Hellwige4d27502015-01-14 10:42:38 +0100997
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700998 ceph_mdsc_pre_umount(fsc->mdsc);
Christoph Hellwige4d27502015-01-14 10:42:38 +0100999 generic_shutdown_super(s);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001000 ceph_mdsc_destroy(fsc);
Christoph Hellwige4d27502015-01-14 10:42:38 +01001001
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001002 destroy_fs_client(fsc);
Christoph Hellwige4d27502015-01-14 10:42:38 +01001003 free_anon_bdev(dev);
Sage Weil16725b92009-10-06 11:31:07 -07001004}
1005
1006static struct file_system_type ceph_fs_type = {
1007 .owner = THIS_MODULE,
1008 .name = "ceph",
Al Viroa7f9fb22010-07-26 16:17:55 +04001009 .mount = ceph_mount,
Sage Weil16725b92009-10-06 11:31:07 -07001010 .kill_sb = ceph_kill_sb,
1011 .fs_flags = FS_RENAME_DOES_D_MOVE,
1012};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08001013MODULE_ALIAS_FS("ceph");
Sage Weil16725b92009-10-06 11:31:07 -07001014
Sage Weil16725b92009-10-06 11:31:07 -07001015static int __init init_ceph(void)
1016{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001017 int ret = init_caches();
Sage Weil16725b92009-10-06 11:31:07 -07001018 if (ret)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001019 goto out;
Sage Weil16725b92009-10-06 11:31:07 -07001020
Yan, Zhengeb13e832014-03-09 23:16:40 +08001021 ceph_flock_init();
Alex Elder3ce6cd12012-01-23 15:49:28 -06001022 ceph_xattr_init();
Yan, Zheng97c85a82014-11-06 15:09:41 +08001023 ret = ceph_snap_init();
1024 if (ret)
1025 goto out_xattr;
Sage Weil16725b92009-10-06 11:31:07 -07001026 ret = register_filesystem(&ceph_fs_type);
1027 if (ret)
Yan, Zheng97c85a82014-11-06 15:09:41 +08001028 goto out_snap;
Sage Weil16725b92009-10-06 11:31:07 -07001029
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001030 pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL);
1031
Sage Weil16725b92009-10-06 11:31:07 -07001032 return 0;
1033
Yan, Zheng97c85a82014-11-06 15:09:41 +08001034out_snap:
1035 ceph_snap_exit();
1036out_xattr:
Alex Elder3ce6cd12012-01-23 15:49:28 -06001037 ceph_xattr_exit();
Sage Weil16725b92009-10-06 11:31:07 -07001038 destroy_caches();
Sage Weil16725b92009-10-06 11:31:07 -07001039out:
1040 return ret;
1041}
1042
1043static void __exit exit_ceph(void)
1044{
1045 dout("exit_ceph\n");
1046 unregister_filesystem(&ceph_fs_type);
Yan, Zheng97c85a82014-11-06 15:09:41 +08001047 ceph_snap_exit();
Alex Elder3ce6cd12012-01-23 15:49:28 -06001048 ceph_xattr_exit();
Sage Weil16725b92009-10-06 11:31:07 -07001049 destroy_caches();
Sage Weil16725b92009-10-06 11:31:07 -07001050}
1051
1052module_init(init_ceph);
1053module_exit(exit_ceph);
1054
1055MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
1056MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
1057MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
1058MODULE_DESCRIPTION("Ceph filesystem for Linux");
1059MODULE_LICENSE("GPL");